Cable mechanical properties testing device and testing method

Abstract

The present invention discloses a cable mechanical property testing device and a testing method. The present invention relates to the technical field of cable detection. The cable mechanical property testing device includes a clamping mechanism, a tension applying mechanism, a torque applying mechanism and a bending mechanism. The clamping mechanism includes two clamps. The tension applying mechanism includes two force applying movable frames and a tension driving component. The torque applying mechanism includes two torque driving components respectively installed on two swing seats, and the two torque driving components are respectively used to drive the two clamps to rotate. The bending mechanism includes a bending resistance component located between the two clamps and a bending driving component transmission-connected to the bending resistance component. The tensile strength test, the torsional strength test and the bending strength test can be continuously completed by clamping the cable once, and the cable can be simulated in different actual installation and use scenarios to improve the accuracy of the tensile strength, torsional strength and bending strength test results of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to a cable mechanical property testing device and a testing method. Background Art

[0002] Cable is a combination of conductors used for power transmission and electrical signal transmission. It is widely used in power systems, construction, transportation, communications and various industrial and civil fields. Before the cable is put into use after production, various mechanical properties need to be tested to show that the produced cable meets the quality standards.

[0003] The cable mechanical performance test includes tensile performance test, torsion resistance test and bending resistance test. The current test equipment can only perform one or two of the tests separately, and cannot meet the needs of performing three tests at the same time. The cable needs to be clamped twice, which reduces the cable production efficiency. Secondly, the cable will be damaged during multiple clamping processes, affecting the accuracy of the test. In addition, the cable is currently stretched and twisted by linear stretching and linear torsion, which cannot simulate the tensile and torsion resistance of the cable under different bending degrees during actual installation and use. The cable can only be bent in one direction of the outer circumference, which cannot simulate the mechanical properties of the cable when it is bent in different directions during actual installation and use, thereby affecting the accuracy of the cable's tensile, torsion and bending resistance test results. Summary of the Invention

[0004] The object of the present invention is to provide a cable mechanical property testing device and testing method to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] The present invention provides a cable mechanical properties testing device, comprising:

[0007] A clamping mechanism, comprising two clamps, wherein the two clamps are used to clamp two ends of the cable;

[0008] The tension applying mechanism includes two force applying mobile frames and a tension driving assembly, wherein the two force applying mobile frames are each provided with a swing seat, and the two clamps are respectively provided on the two swing seats, and the swing seats are swinging relative to the force applying mobile frames around a swing axis extending in a second direction, so that the two clamps respectively follow the axial direction of the two ends of the cable around the swing axis, and the clamps are rotated relative to the swing seats around the axis of the cable, and the tension driving assembly is used to drive the two force applying mobile frames to move closer to and away from each other along the first direction, so as to adjust the distance between the two clamps and apply axial tensile force to the cable;

[0009] The torque applying mechanism includes two torque driving assemblies respectively mounted on the two swing seats, the two torque driving assemblies respectively driving the two clamps to rotate, thereby driving the cable to rotate around its own axis and applying torque to the cable;

[0010] The bending mechanism comprises a bending resistance assembly located between the two clamps, a bending drive assembly transmission-connected to the bending resistance assembly, the bending resistance assembly being used to slidably abut against the outer peripheral wall of the cable, the bending drive assembly being used to drive the bending resistance assembly to move along a third direction to push the cable to bend, the bending resistance assembly comprising a plurality of resistance members slidingly abutting against the outer peripheral wall of the cable, the plurality of resistance members being arranged at an annular interval to form a channel for the cable to pass through, the axial direction of the channel extending along the first direction, the bending resistance assembly further comprising a plurality of resistance drive members transmission-connected one by one to the plurality of resistance members, the plurality of resistance drive members being respectively used to drive the plurality of resistance members to move radially along the channel to change the caliber size of the channel and the center position of the channel;

[0011] The first direction, the second direction and the third direction are arranged perpendicular to each other.

[0012] The cable mechanical properties testing device of the present invention has the following beneficial effects:

[0013] During use, two clamps are clamped at both ends of the cable to control the sliding contact between the bending resistance component and the outer peripheral wall of the cable. When conducting a bending resistance performance test, the bending resistance component is driven by the bending drive component to move along the third direction to push the cable to bend, so that the angle between the cables on both sides of the bending resistance component is to the set curvature. At this time, the two clamps, driven by the tension drive component, follow the distance between the two ends of the cable. At the same time, the two clamps follow the axial rotation of the two ends of the cable respectively, so that the entire cable maintains the set curvature for a set time; when conducting tensile resistance performance tests and anti-twist performance tests, the cable is bent to a set curvature to simulate different degrees of bending of the cable during actual installation and use. The two force-applying moving frames are driven away in the first direction by the tension drive component to apply axial tensile force to the cable to complete tensile resistance at a specific curvature. Performance test, two torsion drive components respectively drive the two clamps to rotate in opposite directions through two adjacent torsion resistance tests, and apply torque to the cable to complete the anti-torsion performance test under a specific curvature; in addition, between two adjacent anti-bending performance tests, between two adjacent tensile performance tests, and between two adjacent anti-torsion performance tests, according to the preset rotation angle interval, the two torsion drive components respectively drive the two clamps to rotate in the same direction to control the rotation of the cable around its own axis, so that different positions of the outer circumference of the cable are oriented towards the direction of movement of the bending resistance component, so as to simulate the cable bending in different directions during actual installation and use. The present invention can continuously complete the tensile performance test, the anti-torsion performance test and the anti-bending performance test by clamping the cable once, and can simulate the cable in different actual installation and use scenarios, thereby improving the accuracy of the tensile, torsion and bending resistance test results of the cable.

[0014] In addition, the present invention uses multiple abutment members to slide against the outer wall of the cable to achieve better limiting abutment of the cable, so that the cable remains bent on a set vertical plane, avoiding cable deviation and affecting the accuracy of the test. It also meets the needs of cables of different sizes and adjusts the distance between the cable bending position and the two ends of the cable in the front-to-back direction.

[0015] As a further improvement of the above technical solution, the bending mechanism also includes a rotation drive component, which includes a rotating ring extending axially along the first direction, a rotation drive structure connected to the rotating ring transmission, and multiple interference members are arranged on the rotating ring in a ring-shaped interval with the axis of the rotating ring. The rotation drive structure is used to drive the rotating ring to rotate around its own axis, and synchronize the multiple interference drive components to drive the interference members to move radially, so that the center position of the channel is eccentric to the rotation center of the rotating ring, so as to drive the cable to shake.

[0016] As a further improvement of the above technical solution, the abutment member is a universal wheel, and the outer peripheral wheel wall of the universal wheel abuts against the outer peripheral wall of the cable.

[0017] As a further improvement of the above technical solution, the bending mechanism also includes a transverse driving assembly, which is used to drive the bending resistance assembly to move along the first direction so that the bending resistance assembly abuts against the cable at different axial positions.

[0018] As a further improvement of the above technical solution, the clamp includes a clamp seat, the clamp seat is provided with a conical clamping hole extending along the first direction, the two ends of the conical clamping hole are divided into a large end and a small end, the small ends on the two clamps are arranged facing each other, the conical clamping hole is provided with at least two clamps, and at least two of the clamps are arranged at intervals along the circumference of the conical clamping hole to form a conical cylinder combination structure that tightly holds the cable.

[0019] As a further improvement to the above technical solution, the large-mouthed end is sleeved with an axially adjustable locking sleeve, and a compression elastic member is provided between the locking sleeve and the tapered tube structure. The compression elastic member axially pushes at least two of the clips to move from the large-mouthed end toward the small-mouthed end, causing the tapered tube assembly structure to contract to clamp the cable.

[0020] The inner peripheral wall of the tapered clamping hole is provided with at least two position-limiting sliding parts extending in the axial direction, and the at least two clamping pieces are respectively slidably matched with the at least two position-limiting sliding parts in the axial direction.

[0021] The present invention also provides a cable mechanical properties testing method, which is applicable to the cable mechanical properties testing device. The cable mechanical properties testing method includes:

[0022] Passing the cable to be tested through the bending resistance component;

[0023] Clamping the two ends of the cable to be tested to the two clamps respectively;

[0024] Controlling the bending abutment component to abut against the outer peripheral wall of the cable;

[0025] Controlling the bending resistance component to move to a first preset position along a third direction according to a first preset curvature, and controlling the distance between the two clamps to a first preset value, so that the cable is tightened and maintained for a first preset time period, thereby completing a bending resistance test;

[0026] Controlling the bending resistance component to move to a second preset position along a third direction according to a second preset curvature, and controlling the distance between the two clamps to a second preset value, applying a preset tensile force to the cable and maintaining it for a second preset time period, so as to complete a tensile performance test;

[0027] Controlling the bending resistance assembly to move along a third direction to a third preset position according to a third preset curvature, controlling the distance between the two clamps to a third preset value, controlling the two clamps to rotate in opposite directions, applying a preset torque to the cable and maintaining it for a third preset time period, thereby completing a torsional resistance test;

[0028] The control is to respectively execute the said anti-bending performance test, the said anti-tensile performance test and the said anti-twisting performance test for multiple times in succession; between two adjacent anti-bending performance tests, between two adjacent anti-tensile performance tests and between two adjacent anti-twisting performance tests, the cable is controlled to rotate around its own axis according to a preset rotation angle interval, so that different positions of the outer periphery of the cable face the direction of movement of the bending resistance component.

[0029] As a further improvement of the above technical solution, the cable mechanical properties testing method further includes:

[0030] During each of the tensile strength test, the tensile strength test, and the torsional strength test, the center position of the channel is controlled to be eccentric with the axis of the rotating ring according to a preset eccentric distance, and then the rotating ring is controlled to rotate around its own axis at a preset rotation speed;

[0031] Between two adjacent bending resistance tests, between two adjacent tensile resistance tests, and between two adjacent torsional resistance tests, the bending resistance component is controlled to move along the first direction to a preset moving position so that the bending resistance component abuts against different axial positions of the cable.

[0032] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0034] Figure 1 This is a structural diagram of an embodiment of a cable mechanical properties testing device provided by the present invention;

[0035] Figure 2 This is a schematic diagram of a cable mechanical properties testing device provided by the present invention, wherein one embodiment thereof performs a bending resistance test on a cable;

[0036] Figure 3 This is a schematic diagram of a cable mechanical properties testing device provided by the present invention, wherein one embodiment thereof performs a tensile properties test on a cable;

[0037] Figure 4This is a schematic diagram of a cable mechanical properties testing device provided by the present invention, wherein one embodiment thereof performs a torsional resistance test on a cable;

[0038] Figure 5 yes Figure 1 A partial enlarged view of part A;

[0039] Figure 6 yes Figure 1 A partial enlarged view of part B;

[0040] Figure 7 This is an axial schematic diagram of an embodiment of a bending interference assembly provided by the present invention, wherein the channel and the rotating ring are eccentric;

[0041] Figure 8 is a cross-sectional view of an embodiment of the clamp provided by the present invention;

[0042] Figure 9 This is a flow chart of an embodiment of the cable mechanical properties testing method provided by the present invention;

[0043] Figure 10 It is a control flow chart that simulates the scenario where the cable shakes due to external influences;

[0044] Figure 11 It is a control flow chart that simulates cable bending scenarios at different axial positions;

[0045] Figure Number:

[0046] Clamp 100; clamp seat 110; tapered clamp hole 111; large end 112; small end 113; limited sliding portion 114; clip 120; sliding boss 121; locking sleeve 130; pressing elastic member 140;

[0047] Tension applying mechanism 200; force applying movable frame 210; swing seat 211; tension driving assembly 220; tension driving motor 221; bidirectional screw rod 222; base 230; first slide groove 231;

[0048] Torsion drive assembly 300; rotating disk 310; first gear ring 320; first drive gear 330; torque drive motor 340;

[0049] Bending mechanism 400; bending interference assembly 410; interference member 411; channel 412; interference drive member 413; bending drive assembly 420; lifting seat 421; lifting drive structure 422; lifting motor 4221; lifting screw 4222; frame 4223; rotation drive assembly 430; rotating ring 431; rotation drive structure 432; second gear ring 4321; second drive gear 4322; rotation drive motor 4323; traverse drive assembly 440; traverse motor 441; traverse screw 442;

[0050] Cable 500. DETAILED DESCRIPTION

[0051] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0052] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0054] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0055] The technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0056] Cable mechanical performance tests mainly include tensile performance tests, torsional performance tests and bending performance tests. However, current testing equipment can only perform one or two of these tests separately, and cannot meet the needs of performing three tests at the same time. All of them require the cable 500 to be clamped twice. In addition, it cannot simulate different scenarios of the cable 500 during actual installation and use, affecting the accuracy of the tensile, torsional and bending test results of the cable 500.

[0057] The present invention proposes a cable mechanical properties testing device, which can continuously complete tensile strength testing, torsional resistance testing and bending resistance testing by clamping the cable 500 once, and can simulate different actual installation and use scenarios of the cable 500, thereby improving the accuracy and efficiency of the tensile strength, torsional resistance and bending resistance test results of the cable 500.

[0058] like Figure 1 As shown, the cable mechanical property testing device according to the embodiment of the present invention includes: a clamping mechanism, a tension applying mechanism 200 , a torque applying mechanism and a bending mechanism 400 .

[0059] The clamping mechanism of this embodiment includes two clamps 100 , and the two clamps 100 are used to clamp both ends of the cable 500 .

[0060] The tension applying mechanism 200 includes two force applying movable frames 210 and a tension driving assembly 220. The two force applying movable frames 210 are arranged at intervals along a first direction. In this embodiment, the first direction is limited to the left-right direction. In other embodiments, the first direction may be the front-back direction or the up-down direction, etc. Figure 1 As shown, the two force-applying movable frames 210 of this embodiment are arranged on the left and right.

[0061] The two force-applying movable frames 210 are both provided with a swing seat 211, and the two clamps 100 are respectively provided on the two swing seats 211, wherein the swing seat 211 is freely swingable relative to the force-applying movable frame 210 around a swing axis extending along the second direction, so that the two clamps 100 can respectively follow the axial swing of the two ends of the cable 500, wherein the second direction of this embodiment is set perpendicular to the first direction, and this embodiment defines the second direction as the front-to-back direction. It can be understood that when the axial directions of the two ends of the cable 500 are tilted, the clamp 100 also tilts along with the end of the cable 500.

[0062] The tension drive assembly 220 of this embodiment is used to drive the two force-applying movable frames 210 to move closer to and away from each other along the first direction to adjust the distance between the two clamps 100 and apply an axial tensile force to the cable 500. It can be understood that when the two ends of the cable 500 are tilted, the tension drive assembly 220 applies an axial component of force to the cable 500, and when the cable 500 extends along the first direction, the tension drive assembly 220 applies a tensile force to the cable 500 along the first direction.

[0063] The torque applying mechanism of this embodiment includes two torque driving assemblies 300 respectively installed on the two swing seats 211. The clamp 100 of this embodiment is arranged to rotate around the axis of the cable 500 relative to the swing seat 211. The two torque driving assemblies 300 are respectively used to drive the two clamps 100 to rotate relative to the two swing seats 211, so as to drive the cable 500 to rotate around its own axis and apply torque to the cable 500. Since this embodiment needs to limit the clamp 100 to be able to follow the axial swing of the two ends of the cable 500, and in order to ensure that the torque applied to the cable 500 is around the axis of the cable 500 itself, and to facilitate the debugging of the equipment, during the design, it is only necessary to ensure that the rotation axis of the clamp 100 driven by the torque driving assembly 300 is concentric with the axis of the clamp 100 itself.

[0064] The bending mechanism 400 of this embodiment includes a bending resistance component 410 located between the two clamps 100 and a bending drive component 420 that is transmission-connected to the bending resistance component 410, wherein the bending resistance component 410 is used to slide and abut against the outer peripheral wall of the cable 500, and the bending drive component 420 is used to drive the bending resistance component 410 to move along a third direction to push the cable 500 to bend. This embodiment defines the third direction as the up and down direction. When the bending resistance component 410 pushes the cable 500 to bend in the up and down directions, it can simultaneously drive the two clamps 100 to swing. In this way, there is no bending deformation between the cable 500 and the clamp 100, and secondly, it ensures that the axes of the two ends of the cable 500 are concentric with the rotation axis of the clamp 100.

[0065] like Figure 1 As shown, before the test, two clamps 100 are used to clamp the two ends of the cable 500 , and the bending abutment assembly 410 is controlled to slide against the outer peripheral wall of the cable 500 .

[0066] like Figure 2 As shown, when conducting a bending resistance test, the bending drive component 420 drives the bending resistance component 410 to move upward to push the cable 500 to bend, so that the angle between the cables 500 on both sides of the bending resistance component 410 is adjusted to a set bending degree. At this time, the two clamps 100, driven by the tension drive component 220, move following the change in the distance between the two ends of the cable 500. At the same time, the two clamps 100 respectively follow the axial swing of the two ends of the cable 500, so that the entire cable 500 maintains the set bending degree for a set time.

[0067] like Figure 3 and Figure 4 As shown, before the tensile strength test and the torsional strength test, the cable 500 is bent to a specific curvature to simulate different bending degrees of the cable 500 during actual installation and use.

[0068] like Figure 3 As shown, when performing the tensile performance test, the tension driving assembly 220 drives the two force-applying movable frames 210 to move away from each other in the left and right directions, applying an axial tensile force to the cable 500 to complete the tensile performance test under a specific curvature.

[0069] like Figure 4 As shown, when performing the anti-twisting performance test, the two torque driving assemblies 300 drive the two clamps 100 to rotate in opposite directions respectively, applying torque to the cable 500 to complete the anti-twisting performance test under a specific curvature.

[0070] The present invention takes into account that the cable 500 will bend in different directions during actual installation and use. Therefore, when conducting tensile, torsion and bending resistance tests, multiple tensile, torsion and bending resistance tests are required to address the situation where the cable 500 bends in different directions. In each test, the cable 500 needs to bend in different directions. Specifically: between two adjacent bending resistance tests, between two adjacent tensile resistance tests, and between two adjacent torsion resistance tests, according to a preset rotation angle interval, the two clamps 100 are driven to rotate in the same direction by the two torque drive assemblies 300 to control the cable 500 to rotate around its own axis, so that different positions on the periphery of the cable 500 are directed toward the direction in which the bending resistance assembly 410 pushes the cable 500 to bend. In this way, the bending resistance assembly 410 abuts against different positions on the periphery of the cable 500. At this time, the bending resistance assembly 410 only needs to move in one direction, which can simulate the scenario where the cable 500 bends in different directions during actual installation and use.

[0071] like Figure 1 As shown, the specific structure of the tension applying mechanism 200 of this embodiment, the tension applying mechanism 200 of this embodiment also includes a base 230, the top of the base 230 is provided with a first slide groove 231 extending in the left and right directions, the lower parts of the two force applying movable frames 210 are slidingly connected to the first slide groove 231, and the tension driving assembly 220 includes a tension driving motor 221 and a bidirectional screw rod 222 that are mutually transmission-connected, the bidirectional screw rod 222 is respectively threadedly connected to the two force applying movable frames 210, and the bidirectional screw rod 222 is driven to rotate by the tension driving motor 221 to drive the two force applying movable frames 210 to move closer to and away from each other.

[0072] In some other embodiments, one of the two force-applying movable frames 210 is fixed and the other is movable, and the tension driving assembly 220 drives one of the force-applying movable frames 210 to move; or the tension driving assembly 220 uses two tension driving components to drive the two force-applying movable frames 210 to move separately.

[0073] The swing seat 211 is mounted on the upper portion of the force-applying movable frame 210 via a swing shaft extending forward and backward.

[0074] like Figure 5As shown, the specific structure of the torsion drive assembly 300 of this embodiment includes a rotating disk 310 rotatably mounted on the swing seat 211, a first gear ring 320 fixedly mounted on the rotating disk 310, a first driving gear 330 meshing with the first gear ring 320, and a torsion drive motor 340 transmission-connected to the first driving gear 330. The clamp 100 is coaxially mounted on the rotating disk 310, and the first driving gear 330 is driven to rotate by the torsion drive motor 340, which drives the rotating disk 310 to rotate and synchronously drives the clamp 100 to rotate around its own axis.

[0075] In order to balance the forces, the rotation axis of the rotating disk 310 of this embodiment is arranged to intersect with the swing axis of the swing seat 211 , so that the swing seat 211 will not shake when the cable 500 is stretched.

[0076] like Figure 6 and Figure 7 As shown, with respect to the structure of the bending resistance assembly 410, the bending resistance assembly 410 of this embodiment includes a plurality of resistance members 411 that are in sliding contact with the outer peripheral wall of the cable 500. The plurality of resistance members 411 are arranged in a ring-shaped interval to form a channel 412 for the cable 500 to pass through. The axial direction of the channel 412 extends in the left and right directions. In this embodiment, a plurality of resistance members 411 are used to slide and abut against the outer peripheral wall of the cable 500 to achieve better limiting contact with the cable 500, so that the cable 500 remains bent on a set vertical plane, thereby avoiding the cable 500 from deviating and affecting the accuracy of the test.

[0077] In order to meet the needs of cables 500 of different sizes and adjust the bending position of the cable 500 and the distance between the two ends of the cable 500 in the front-to-back direction, the bending resistance assembly 410 also includes a plurality of resistance driving members 413 that are transmission-connected to the plurality of resistance members 411 one by one. The plurality of resistance driving members 413 are respectively used to drive the plurality of resistance members 411 to move radially along the channel 412 to change the diameter size and the center position of the channel 412. If the outer diameter of the cable 500 increases, the diameter of the channel 412 surrounded by the plurality of resistance members 411 is expanded; if the outer diameter of the cable 500 decreases, the diameter of the channel 412 is reduced; at the same time, according to the scenario requirements of the test simulation, the positions of the plurality of resistance members 411 are adjusted by controlling the driving stroke of the plurality of resistance driving members 413 to change the center position of the channel 412. If the test is performed in a static state, the displacement of the center position of the channel 412 in the front-to-back direction is adjusted. In the initial state, the center position of the channel 412 is located on the same vertical plane as the axis of the two clamps 100.

[0078] In addition, the present invention also takes into account the need to simulate the mechanical properties of the cable 500 when the cable 500 is shaken by external influences, such as Figure 1 and Figure 6 As shown, the bending mechanism 400 of this embodiment further includes a rotation drive assembly 430, wherein the rotation drive assembly 430 includes a rotating ring 431 extending axially along a first direction, a rotation drive structure 432 for driving the rotating ring 431 to rotate around its own axis, and a plurality of resistance members 411 are arranged on the rotating ring 431 in a ring-shaped manner with the axis of the rotating ring 431. When it is necessary to test the cable 500 in a shaking state, the bending degree, tensile force or torsion of the cable 500 is adjusted to a set value to change the center position of the channel 412. The center position of the channel 412 and the center position of the rotating ring 431 are eccentrically set according to a set distance. It can be understood that the axis of the cable 500 and the center position of the rotating ring 431 are eccentrically set, and then the rotating ring 431 is driven to rotate at a set speed by the rotating drive structure 432 to drive the curved part of the cable 500 to shake. At the same time, the rotating drive structure 432 can also be controlled to drive the rotating ring 431 to rotate back and forth according to the set amplitude and frequency to simulate the swing of the cable 500 and perform dynamic testing on the cable 500.

[0079] like Figure 1 Detailed description of the structure of the rotation drive structure 432 and the bending drive assembly 420 in some embodiments is shown. The bending drive assembly 420 includes a lifting base 421 and a lifting drive structure 422 that drives the lifting base 421 to move vertically. In this embodiment, the lifting drive structure 422 utilizes a motor and a screw. Specifically, the lifting drive structure 422 includes a lifting motor 4221, a lifting screw 4222, and a frame 4223. The lifting screw 4222 is vertically rotatably mounted on the frame 4223. The lifting motor 4221 is in transmission connection with the lifting screw 4222, which is in threaded transmission connection with the lifting base 421. In other embodiments, the bending drive assembly 420 may utilize other linear drive structures.

[0080] like Figure 6 As shown, the rotation drive structure 432 includes a second gear ring 4321 coaxially fixed to the rotating ring 431, a second drive gear 4322 meshing with the second gear ring 4321, and a rotation drive motor 4323 drivingly connected to the second drive gear 4322. In this embodiment, the rotating ring 431 is rotatably mounted on the side of the lifting base 421. The lifting base 421 in this embodiment is a sleeve structure and has a rotation slot on the side of the lifting base 421. The rotating ring 431 slides in engagement with the rotation slot via a slider. In other embodiments, the rotation drive structure 432 may employ other drive structures.

[0081] The plurality of conflict driving members 413 are radially mounted on the rotating ring 431 in an annular shape. The telescopic driving ends of the conflict driving members 413 are connected to the conflicting member 411 . The conflict driving members 413 may be structures such as electric poles, air cylinders, and hydraulic cylinders.

[0082] In order to reduce damage to the surface of the cable 500, the abutment 411 of this embodiment is a universal wheel, the outer peripheral wheel wall of the universal wheel abuts against the outer peripheral wall of the cable 500, when the cable 500 moves relative to the axial direction of the channel 412, as shown in FIG. Figure 6 As shown, the universal wheel rotates to a state where its axis is perpendicular to the axis of the channel 412, and guides the cable 500 by rolling, which can adapt to the tensile performance test and the bending performance test. If the cable 500 rotates relative to the channel 412, as shown in FIG. Figure 7 As shown, the universal wheel is now rotated to a state parallel to the axis of the channel 412, so that the universal wheel can roll along the circumference of the cable 500, which is suitable for anti-torsion performance testing and is also suitable for various tests of the cable 500 under dynamic conditions.

[0083] In some other embodiments, the resisting member 411 may be in the form of a ball, or directly in the form of a slider structure.

[0084] Since the cable 500 will bend and deform at different axial positions during actual use, in order to simulate the bending scenarios of the cable 500 at different axial positions, the bending mechanism 400 of this embodiment also includes a transverse drive component 440. The transverse drive component 440 is used to drive the bending resistance component 410 to move in the left and right directions, so that the bending resistance component 410 abuts against the cable 500 at different axial positions, thereby driving the cable 500 to bend at different axial positions to complete various mechanical performance tests.

[0085] Specifically, the transverse drive assembly 440 of this embodiment also adopts a motor and screw method. The frame 4223 is installed on the base 230 for sliding along the left and right directions, and the transverse drive assembly 440 includes a transverse motor 441 and a transverse screw 442 that are connected to each other in a transmission manner. The transverse screw 442 is threadedly connected to the frame 4223.

[0086] At the same time, for the connection between the clamp 100 and the cable 500, it is necessary to ensure the coaxiality and firmness of the end of the cable 500 and the clamp 100. The clamp 100 of this embodiment includes a clamp seat 110, wherein the clamp seat 110 is provided with a conical clamping hole 111, and the two ends of the conical clamping hole 111 are divided into a large end 112 and a small end 113. The small ends 113 on the two clamps 100 are arranged facing each other, and the conical clamping hole 111 is provided with at least two clips 120. At least two clips 120 are annularly spaced to form a conical tube combination structure that tightly holds the cable 500. When in use, the cable 500 passes through the conical tube combination structure to drive the clamp. 100 moves toward the side of the large-mouthed end 112 to tension the cable 500. At this time, the cable 500 moves toward the side of the small-mouthed end 113 relative to the tapered clamping hole 111. Under the action of friction, the cable 500 pulls the tapered tube combination structure toward the side of the small-mouthed end 113. Under the guidance of the tapered surface of the tapered clamping hole 111, the clamping piece 120 hugs the cable 500 to lock the cable 500. This ensures the coaxiality of the cable 500 and the tapered clamping hole 111, and improves the firmness of the locking of the cable 500. During the stretching process, the harder the cable 500 is pulled, the tighter the clamping piece 120 hugs the cable 500.

[0087] Furthermore, in order to prevent the tapered tube assembly structure from loosening when the two clamps 100 are close to each other, as shown in FIG. Figure 8 As shown, in this embodiment, a locking sleeve 130 that is axially adjustable is sleeved on the large end 112, and a compression elastic member 140 is provided between the locking sleeve 130 and the tapered tube combination structure. The compression elastic member 140 pushes at least two clips 120 axially from the large end 112 to the small end 113, so that the tapered tube combination structure contracts to clamp the cable 500. When clamping the cable 500, the locking sleeve 130 is first controlled to move from the small end 113 to the large end 112, reducing the compression elastic member 140. 40 provides elastic force to the conical tube combination structure, so that the cable 500 can be inserted into the conical tube combination structure, and then the locking sleeve 130 is controlled to move from the large-mouth end 112 to the small-mouth end 113, squeezing the compression elastic member 140, increasing the elastic force provided by the compression elastic member 140 to the conical tube combination structure, and pushing the conical tube combination structure to move from the large-mouth end 112 to the small-mouth end 113. Under the guidance of the conical surface of the conical clamping hole 111, the clamping piece 120 holds the cable 500 tightly to pre-tighten the cable 500.

[0088] The locking sleeve 130 of this embodiment is threadedly connected to the large-mouth end 112 to achieve axial movement adjustment and self-locking through the threaded connection, and the pressing elastic member 140 adopts a spring structure.

[0089] Since torque is generated between the clamp 100 and the cable 500 during the anti-twisting test, in order to prevent the clip 120 from rotating in the conical clamping hole 111, the inner peripheral wall of the conical clamping hole 111 of this embodiment is provided with at least two limiting sliding parts 114 extending axially, and at least two clips 120 are respectively axially slidably matched with the at least two limiting sliding parts 114 to limit the rotation of the clip 120 without interfering with the axial movement of the clip 120. The limiting sliding part 114 of this embodiment is a groove structure, and the outer wall of the clip 120 is provided with a sliding boss 121 that slides with the groove structure.

[0090] In this embodiment, the inner circumferential surface of the clamping piece 120 is provided with a friction structure that is in frictional contact with the cable 500 to increase the friction between the clamping piece 120 and the cable 500, thereby improving the stability of clamping the cable 500.

[0091] like Figure 9 As shown, the present invention also provides a method for testing the mechanical properties of a cable 500, which is applicable to the above-mentioned cable mechanical properties testing device. The method for testing the mechanical properties of the cable 500 includes:

[0092] Step S100: inserting the cable 500 to be tested into the bending resistance component 410;

[0093] Step S200: Clamping two ends of the cable 500 to be tested onto two clamps 100 respectively;

[0094] Step S300: Control the bending abutment component 410 to abut against the outer wall of the cable 500;

[0095] Step S400: Controlling the bending resistance assembly 410 to move to a first preset position along a third direction according to a first preset curvature, and controlling the distance between the two clamps 100 to a first preset value, so that the cable 500 is tightened and maintained for a first preset time period, thereby completing a bending resistance test;

[0096] Step S500: Controlling the bending resistance assembly 410 to move to a second preset position along the third direction according to a second preset curvature, and controlling the distance between the two clamps 100 to a second preset value, applying a preset tensile force to the cable 500 and maintaining it for a second preset time period, thereby completing a tensile resistance test;

[0097] Step S600: Controlling the bending resistance assembly 410 to move along a third direction to a third preset position according to a third preset curvature, controlling the distance between the two clamps 100 to a third preset value, controlling the two clamps 100 to rotate in opposite directions, applying a preset torque to the cable 500 and maintaining it for a third preset time period, thereby completing a torsional resistance test;

[0098] Step S700: Control the execution of multiple consecutive bending resistance tests, multiple consecutive tensile resistance tests and multiple consecutive torsional resistance tests respectively. Between two adjacent bending resistance tests, between two adjacent tensile resistance tests and between two adjacent torsional resistance tests, control the cable 500 to rotate around its own axis according to a preset rotation angle interval, so that different positions on the periphery of the cable 500 face the direction of movement of the bending resistance component 410.

[0099] In step S100 and step S200, the cable 500 is passed through the channel 412 formed between the multiple resistance members 411, and then the two ends of the cable 500 are clamped. First, the locking sleeve 130 is loosened to reduce the elastic force provided by the compression elastic member 140 to the conical tube combination structure, so that the cable 500 is inserted into the conical tube combination structure. Then, the locking sleeve 130 is tightened to squeeze the compression elastic member 140, increase the elastic force provided by the compression elastic member 140 to the conical tube combination structure, and push the conical tube combination structure from the large end 112 to the small end 113. Under the guidance of the conical surface of the conical clamping hole 111, the clamping piece 120 hugs the cable 500 to achieve locking of the cable 500.

[0100] In step S300 , the plurality of resisting members 411 are driven by the plurality of resisting driving components 413 to move radially along the channel 412 to change the diameter of the channel 412 so that the plurality of resisting members 411 abut against the outer wall of the cable 500 .

[0101] In step S400, Figure 2 As shown, the bending drive component 420 drives the bending resistance component 410 to move in the up and down directions to the first preset position, that is, drives the middle part of the cable 500 to move upward to push the two ends of the cable 500 to bend downward, so that the angle between the cables 500 on both sides of the bending resistance component 410 is set to the first preset curvature. At the same time, the two clamps 100, driven by the tension drive component 220, move following the distance between the two ends of the cable 500, wherein the clamps 100 are consistent with the axes of the two ends of the cable 500, and the distance between the two clamps 100 is set to the first preset value, so that the entire cable 500 maintains a first preset time period at the first preset curvature, wherein the first preset time period and the first preset curvature are determined according to the requirements of the bending resistance test, and the first preset value and the first preset position are determined according to the length of the cable 500.

[0102] In step S500, Figure 3As shown, the bending drive component 420 drives the bending resistance component 410 to move in the up and down directions to the second preset position to push the cable 500 to bend, so that the angle between the cables 500 on both sides of the bending resistance component 410 is to the second preset curvature. At the same time, the two clamps 100, driven by the tension drive component 220, follow the distance between the two ends of the cable 500. The clamps 100 are consistent with the axes of the two ends of the cable 500, and the tension drive component 220 drives the two force-applying moving frames 210 away from each other in the left and right directions, controls the distance between the two clamps 100 to the second preset value, applies a preset tensile force to the cable 500 and maintains the second preset time period, wherein the second preset time period, the second preset curvature and the second preset value are determined according to the requirements of the tensile performance test, and the second preset position is determined according to the length of the cable 500.

[0103] In step S600, Figure 4 As shown, the bending drive component 420 drives the bending resistance component 410 to move along the third direction to the third preset position to push the cable 500 to bend, so that the angle between the cables 500 on both sides of the bending resistance component 410 is to the third preset curvature. At the same time, the two clamps 100, driven by the tension drive component 220, move following the distance between the two ends of the cable 500. The clamps 100 are consistent with the axes of the two ends of the cable 500, and the distance between the two clamps 100 is to the third preset value. Then, the two clamps 100 are driven to rotate in opposite directions by the two torsion drive components 300 to apply a preset torque to the cable 500. The third preset time period and the third preset curvature are determined according to the requirements of the anti-torsion performance test, and the third preset value and the third preset position are determined according to the length of the cable 500.

[0104] In step S700, the two torque drive components 300 respectively drive the two clamps 100 to rotate in the same direction at a preset rotation angle interval to control the cable 500 to rotate around its own axis, so that different positions on the periphery of the cable 500 are oriented toward the direction in which the bending resistance component 410 moves in the up and down directions. In this way, the bending resistance component 410 can push different positions on the periphery of the cable 500 to bend. At this time, the bending resistance component 410 only needs to move in one direction, thereby simulating the situation in which the cable 500 bends in different directions during actual installation and use.

[0105] If the preset rotation angle interval is set to 60 degrees, the cable 500 needs to be subjected to six bending resistance tests, six tensile resistance tests, and six torsion resistance tests respectively.

[0106] like Figure 10The control flow chart shown in FIG. 5 simulates a scenario in which the cable 500 is shaken by external influences. The method for testing the mechanical properties of the cable 500 in this embodiment further includes step S800:

[0107] Step S800, during each tensile strength test, tensile strength test and torsional strength test, the center position of the control channel 412 is eccentrically set with respect to the axis of the rotating ring 431 according to a preset eccentric distance, and then the rotating ring 431 is controlled to rotate around its own axis according to a preset rotation speed.

[0108] Specifically, when it is necessary to test the cable 500 in a shaking state, the curvature, tensile force or torque of the cable 500 is adjusted to a set value, and the positions of the multiple interference drive members 411 are adjusted by controlling the driving stroke of the multiple interference drive components 413 to change the center position of the channel 412, so that the center position of the channel 412 and the center position of the rotating ring 431 are eccentrically set according to a set distance. It can be understood that the axis of the cable 500 and the center position of the rotating ring 431 are eccentrically set, and then the rotating ring 431 is driven to rotate by the rotating drive structure 432 to drive the curved part of the cable 500 to shake. At the same time, the rotating drive structure 432 can also be controlled to drive the rotating ring 431 to rotate back and forth according to the set amplitude and frequency to simulate the swing of the cable 500 and perform dynamic testing on the cable 500.

[0109] like Figure 11 The control flow chart shown simulates the bending of the cable 500 at different axial positions. The mechanical property testing method of the cable 500 in this embodiment further includes step S900:

[0110] In step S900, between two adjacent bending resistance tests, between two adjacent tensile resistance tests, and between two adjacent torsional resistance tests, the bending resistance component 410 is controlled to move along the first direction to a preset moving position so that the bending resistance component 410 abuts against different axial positions of the cable 500.

[0111] Specifically, the frame 4223 is driven to move in the left and right directions by the transverse drive assembly 440, so as to drive the bending resistance assembly 410 to move in the left and right directions to a preset moving position, so that the bending resistance assembly 410 abuts against the cable 500 at different axial positions, and then drives the cable 500 to bend at different axial positions to complete various mechanical performance tests.

[0112] In some embodiments, two angle sensors, two tension sensors, two torque sensors, and multiple displacement sensors are also provided. The two angle sensors are respectively installed between the two force-applying movable frames 210 and the two swing seats 211, the two tension sensors are respectively installed on the two clamps 100, the two torque sensors are respectively installed between the two rotating disks 310 and the two swing seats 211, and the multiple displacement sensors are respectively installed on the two force-applying movable frames 210, the frame 4223 and the base 230. Among them, the angle sensor is used to detect the swing angle of the clamp 100, and the curvature of the cable 500 is calculated based on the swing angle of the two clamps 100 and the distance between the two clamps 100. The tension sensor is used to detect the axial force between the clamp 100 and the cable 500 to detect the tensile force applied to the cable 500. The torque sensor is used to detect the torque between the clamp 100 and the cable 500 to detect the torque applied to the cable 500. The displacement sensor is used to detect the moving position of the bending resistance component 410 and the force-applying movable frame 210.

[0113] The present invention can continuously complete the tensile strength test, the torsional resistance test and the bending resistance test by clamping the cable 500 once, and can simulate the cable 500 in different actual installation and use scenarios, thereby improving the accuracy of the tensile strength, torsional resistance and bending resistance test results of the cable 500.

[0114] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" indicate that a particular feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

[0115] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A cable mechanical properties testing device, characterized in that: include: A clamping mechanism, comprising two clamps, wherein the two clamps are used to clamp two ends of the cable; The tension applying mechanism comprises two force applying mobile frames and a tension driving assembly, wherein the two force applying mobile frames are each provided with a swing seat, and the two clamps are respectively provided on the two swing seats, and the swing seats are swinging relative to the force applying mobile frames around a swing axis extending in a second direction, so that the two clamps respectively swing around the swing axis following the axial direction of the two ends of the cable, and the clamps are rotated relative to the swing seats around the axis of the cable, and the tension driving assembly is used to drive the two force applying mobile frames to move closer to and away from each other along the first direction, so as to adjust the distance between the two clamps and apply axial tensile force to the cable; The torque applying mechanism includes two torque driving assemblies respectively mounted on the two swing seats, the two torque driving assemblies respectively driving the two clamps to rotate, thereby driving the cable to rotate around its own axis and applying torque to the cable; The bending mechanism comprises a bending resistance assembly located between the two clamps, a bending drive assembly transmission-connected to the bending resistance assembly, the bending resistance assembly being used to slidably abut against the outer peripheral wall of the cable, the bending drive assembly being used to drive the bending resistance assembly to move along a third direction to push the cable to bend, the bending resistance assembly comprising a plurality of resistance members slidingly abutting against the outer peripheral wall of the cable, the plurality of resistance members being arranged at an annular interval to form a channel for the cable to pass through, the axial direction of the channel extending along the first direction, the bending resistance assembly further comprising a plurality of resistance drive members transmission-connected one by one to the plurality of resistance members, the plurality of resistance drive members being respectively used to drive the plurality of resistance members to move radially along the channel to change the caliber size of the channel and the center position of the channel; Wherein, the first direction, the second direction and the third direction are arranged perpendicular to each other; The bending mechanism further includes a rotation drive assembly, the rotation drive assembly including a rotating ring extending axially along the first direction, a rotation drive structure connected to the rotating ring transmission, a plurality of the interference members are arranged on the rotating ring in an annular manner with the axis of the rotating ring, the rotation drive structure is used to drive the rotating ring to rotate along its own axis, and synchronize the plurality of interference drive members to drive the interference members to move radially, so that the center position of the channel is eccentric with the rotation center of the rotating ring, so as to drive the cable to shake; The bending mechanism further includes a transverse driving assembly, the transverse driving assembly being configured to drive the bending abutting assembly to move along the first direction so that the bending abutting assembly abuts against the cable at different positions in the axial direction; The clamp includes a clamp seat, which is provided with a conical clamping hole extending along the first direction. The two ends of the conical clamping hole are divided into a large end and a small end. The small ends on the two clamps are arranged facing each other. The conical clamping hole is provided with at least two clamps, and at least two of the clamps are arranged at intervals along the circumference of the conical clamping hole to form a conical cylinder combination structure that tightly holds the cable.

2. The cable mechanical properties testing device according to claim 1, characterized in that: The abutment member is a universal wheel, and the outer peripheral wheel wall of the universal wheel abuts against the outer peripheral wall of the cable.

3. The cable mechanical properties testing device according to claim 1, characterized in that: The large-mouthed end is sleeved with an axially adjustable locking sleeve, and a compression elastic member is provided between the locking sleeve and the tapered tube assembly structure. The compression elastic member axially pushes at least two of the clips to move from the large-mouthed end toward the small-mouthed end, causing the tapered tube assembly structure to contract to clamp the cable. The inner peripheral wall of the tapered clamping hole is provided with at least two position-limiting sliding parts extending in the axial direction, and the at least two clamping pieces are respectively slidably matched with the at least two position-limiting sliding parts in the axial direction.

4. A method for testing the mechanical properties of a cable, characterized by: Applicable to the cable mechanical properties testing device according to any one of claims 1 to 3, the cable mechanical properties testing method comprising: Passing the cable to be tested through the bending resistance component; Clamping the two ends of the cable to be tested to the two clamps respectively; Controlling the bending abutment component to abut against the outer peripheral wall of the cable; Controlling the bending resistance component to move to a first preset position along a third direction according to a first preset curvature, and controlling the distance between the two clamps to a first preset value, so that the cable is tightened and maintained for a first preset time period, thereby completing a bending resistance test; Controlling the bending resistance component to move to a second preset position along a third direction according to a second preset curvature, and controlling the distance between the two clamps to a second preset value, applying a preset tensile force to the cable and maintaining it for a second preset time period, so as to complete a tensile performance test; Controlling the bending resistance assembly to move along a third direction to a third preset position according to a third preset curvature, controlling the distance between the two clamps to a third preset value, controlling the two clamps to rotate in opposite directions, applying a preset torque to the cable and maintaining it for a third preset time period, thereby completing a torsional resistance test; The control is to respectively execute the said anti-bending performance test, the said anti-tensile performance test and the said anti-twisting performance test for multiple times in succession; between two adjacent anti-bending performance tests, between two adjacent anti-tensile performance tests and between two adjacent anti-twisting performance tests, the cable is controlled to rotate around its own axis according to a preset rotation angle interval, so that different positions of the outer periphery of the cable face the direction of movement of the bending resistance component.

5. The cable mechanical properties testing method according to claim 4, characterized in that: The bending mechanism further includes a rotation drive assembly and a transverse drive assembly, wherein the rotation drive assembly includes a rotating ring extending axially along the first direction, a rotation drive structure for driving the rotating ring to rotate around its own axis, a plurality of the interference members are arranged on the rotating ring in an annular manner with the axis of the rotating ring, and the transverse drive assembly is used to drive the bending interference assembly to move along the first direction; The cable mechanical properties testing method further comprises: During each of the tensile strength test, the tensile strength test, and the torsional strength test, the center position of the channel is controlled to be eccentric with the axis of the rotating ring according to a preset eccentric distance, and then the rotating ring is controlled to rotate around its own axis at a preset rotation speed; Between two adjacent bending resistance tests, between two adjacent tensile resistance tests, and between two adjacent torsional resistance tests, the bending resistance component is controlled to move along the first direction to a preset moving position so that the bending resistance component abuts against different axial positions of the cable.

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